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- URN zum Zitieren dieses Dokuments:
- urn:nbn:de:bvb:355-epub-19712
- DOI zum Zitieren dieses Dokuments:
- 10.5283/epub.1971
Zusammenfassung
The two-phonon infrared absorption spectrum of the covalent elemental semiconductors Si and Ge is calculated completely ab initio. Besides the harmonic phonon eigen solutions this involves the phonon-photon coupling constants, the so called second-order dipole moments (also called dipole coefficients). These are given by the third-order derivatives of the total energy with respect to an electric ...
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